. wireless audio intercom system can support 100 persons intercommunicating at most.
using 433mhz public frequency.
air transfer rate: 256k .
transmitting power: < 18dbm, receive sensitivity: <-100 .
strong anti-jamming capability .
panel with 10 number buttons, a call button and two indicator lights: power indicator light (red), operating indicator light (green).
with coding, giving code, id setting functions.
dc5v,or li-ion battery power supply, standby current:3.5ma, work current:400ma.
communication distance: about 1-8 floors in building or 1km